Strictly speaking, you can’t call infant baptism ‘unbiblical’.
At that hour of the night the jailer took them and washed their wounds; then immediately he and all his family were baptized.
Yes, I also baptized the household of Stephanas; beyond that, I don’t remember if I baptized anyone else.
When she and the members of her household were baptized, she invited us to her home.
Let the little children come to me, and do not hinder them
I praise you, Father, Lord of heaven and earth, because you have hidden these things from the wise and learned, and revealed them to little children.